Bolt-threading machine.



C. VALE & T. G. MUNDY.

BOLT THR-EADING MACHINE.

APPLICATION FILED SEPT.11,1913.

4 SHEETS-SHEET 1.

Patented Sepfi. 25 1914.

WITNESSES 14/ MTORNEYS THE NORRIS PETERS 60.. PHOTOLITHO., WASHINGTON. D C.

C. VALE & T. C. MUNDY. BOLT THREADING MACHINE.

APPLICATION FILED SEPT. 11. 1913.

Patented Sept. 29, 1914.

4 SHEETS-SHEET 2.

WITNESSES 750M]; 6. Mun 0);

THE NORRIS PETERS :0. PHOTO-LIIHQ, WASHINGTON, n, r

ATTORNEYS mun G. VALE & T. G. MUNDY.

BOLT THREADING MACHINE. APPLICATION FILED 33M. 11, 1913.

Patented Sept. 29, 1914.

4 SHEETS-SHEET 3 THE NORRIS PETERS co, F'HUTO-LITHO.. WASHINGTON. n. c.

C. VALE & T. C. MUNDY.

BOLT THREADING MACHINE.

AIPLIOATION FILED SEPT. 11, 1913.

1 1 1 2,, 1 75. Patented Sept. 29, 1914.

\ 4 BHEETS-SHEET 4 s 1 7 Q Ema WITNESSES INVENTORS 62 flit N65 V/u E k 1% THOMAS C. Mun 0r, Xg/ 8r M Q ATTORNEYS THE NORRIS PETERS CO4, PHOTO-LITHCL. WASHINGTON. I). r:

CLARENCE VALE AND THOMAS CLARENCE MUNDY, OFBOANOKE, VIRGINIA.

BOLT-THREADING MACHINE.

Application filed September 11, 1913. Serial No. 789,400.

'0 all whom it may concern Be it known that we, CLARENCE VALE and THOMAS CLARENCE MUNDY, citizens of the United States, and residents of Roanoke, in the county of Roanoke and State of Virginia, have invented a new and useful Improvement in Bolt-Threading Machines, of which the following is a specification.

Our invention relates to an improvement in bolt threading machines and it consists in the combinations, constructions and ar rangements herein described and claimed.

An object of our invention is to provide a device by means of which articles such as bolts may be accurately and quickly threaded.

A further object of our invention is to provide means for threading bolts comprising a revoluble face plate having cutters with means for automatically releasing the cutters at a predetermined time and means for revolving the face plate to bring any of the cutters into operative position.

Other objects and advantages will appear in the following specification, and the novel features of the invention will be particularly pointed out in the appended claims.

Our invention is illustrated in the accompanying drawings forming part of this application in which Figure 1 is a section along the line 1-1 of Fig. 4, Fig. 2 is a section along the line 2-2 of Fig. 1, looking in the direction of the arrow, Fig. 3 is a portion ofan end view of the device, Fig. 4 is a section along the line 4-4 of Fig. 2, Fig. 5 is aside view, partly in section, of one end of. the apparatus, Fig. 6 is a section along the line 66 of Fig. 5, and Fig. 7 is a face view of the yokes for operating the .cutters.

In carrying out our invention we provide a base 1 upon which is mounted a support or standard 2, which serves as a bearingfor a shaft 3 having a reduced end portion4 (see Fig 1) upon which is loosely mounted a gear 5 having a clutch member 6 arranged to be engaged by a companion clutch memher 7 which is geared to the shaft 4. The clutch 6 is designed to be operated by a yoke 8 which forms part of the lever 10 which is pivoted at 9 and which is pivotally connected with a rod 11 which passes for- I wardly and is connected at 12 to thehand lever 13 which is pivoted at '14 upon a bracket 15. (See Fig. 5.)

I The shaft 3 bearsa face-platexl6 which is Specification of Letters Patent. Patented Sept. 29, 1914. 4

17 arranged to enter an opening 17 in the v face-plate and having a head 18 on one side of the face-plate. On the other side of the face-plate is a slidable collar 19 having tapering T-shaped slots 20 arranged to receive cutters 21 which pass through openings in the hollow shaft 17 at right angles to the longitudinal axis thereof. The collar 19 may be moved toward or away from the face-plate by, means of a yoke 22 which is pivotally mounted at22", in a bearing car- I ried by a. screw 23. This yoke enters a groove in the collar '19 and its upper end is securedtothe stem 24 which passes through the face-plate and is provided with a head 25. A spiral spring 26 normally keeps the yoke toward the faceplate. Meansis provided, however, for forcing the yoke 22 away from the face-plate into the dotted line position shown in Fig. 1, in which position the locking lug 27 X of a spring 27 which passes through the yoke will engage the yoke tohold the collar 19 in outer position. The shifting of the collar 19to its outer position causes the inward movement of the cutters, while the shifting of the collar to- 5 Ward the face-plate causes an outward movement of the cutters. As shown in Fig. 1 the cutter holders are disposed symmetrically about the shaft 3. These cutter holders are designed to be arranged in pairs. In Fig.

2 we-have shown eight cutter holders which we have designated in general as IVIII. These are arranged in pairs so that a pair may be brought into operative position at the same time. and VI are inoperative position and the others are out of operative position.

Referring now to Fig. 3 it will be seen that the standard 2 forms a bearing for a In Fig. 2 the cutters IV v pairof hollow shafts 28 and 29 respectively.

Upon theshaft 28 is a gear 30 while the shaft 29 bears a gear 31. Both of these gears 30 and 31 are in mesh with the gear 5 which is loosely mounted on the shaft 4.

They are also in mesh with a gear 32 on the shaft 33, the latter being a drive shaft and being I connected with any suitable source of power. Referring now to Fig. 4 it will be seen that :shafts. 28 M1529 are provided With slidable clutch members 34 and 35 respectively, arranged to be operated simultaneously by means of a lateral extending arm 36 secured to the top of an arm 37 carried by the rod 11. The clutch members 34 and 35 are arranged to engage the heads 18 which themselves constitute the clutch members as clearly shown in Fig. 5, thereby transmitting rotary movement to the cutter holders. The bolt carrier comprises a block or body portion 38 which has a lower dovetailed extension 38 (see Fig. 6') arranged to enter a dove-tailed slot 39 in the base portion 1. The block is provided with a shaft 40 having a pinion 41 arranged to engage a rack 42 carried by the base portion for moving the block 38 toward and away from the face-plate 16. In order to manipulate the shaft 40 a hand wheel 43 is provided. The block 38 is also provided with a shaft 44 which is provided at one end with a hand wheel 45 and bears right and left hand screws 44 and 44 respectively. These screws are designed to enter and engage the clamping members 46 and 46* (see Fig. 6-) which are provided with openings-to receive the bolt 47. The block 38 is arranged to bear rods 48 having bent end portions 48 which are arranged to engage the springs 27 as will be explained later.

From the foregoing description of the various parts of the device, the operation thereof may be readily understood.

We will assume that the apparatus is in the position shown in Fig. 2 in which the cutter holders IV and VI are in operative position. In this position the hand-lever 13 is swung over to the right as shown in Fig. 5, thereby shifting a stop lug 49 from the dotted line position shown in Fig. 1 tothe full line position and causing it to enter a recess 50 in the face-plate, thereby preventing the latter from rotating. The shifting of the lever 13 to the right in Fig. 5 causes the retraction of the clutch member 7 from the clutch member 6. It causes, however, the clutch members 34 and 35 to be in operative relation with the clutch members 18', the springs 51 on the shafts 28 and 29 aiding in keeping these clutch members in engagement. The cutter holders 4 an'd 6 will therefore be revolved. The belt 47 is pressed between the clamping members 46 and 46 and is secured in position by means of the wheel 45. As will be seen from Fig. 4 there are two of these blocks 38, one on each side of the center. Grips or handles 52 are now pulled outwardly thereby moving the bars 53 to the right as shown'in Figs. 4 and 5, and causing the arms 54 which are carried by the bars 53 to engage the heads '25 of'thestems 24 which are connected with the yokes 22 that operate the collars 19' of 'the cutter holders'lv and VI. In. Fig. 5 it will be seen that the arms 54 are bent outwardly at their upper ends in position to engage the heads 25. This pushes the yokcs of the cutter holders 4 and G into the dotted line position shown in Fig. 1, whereby the springs 27 cause the lugs 27 to enter behind the yokes and retain them in their operative position. The shifting of the yokcs causes the shifting of the collars 19 and thereby forces the cutter members 21 inwardly. Now by turning the hand wheel 43 the bolts are advanced toward the cutters which are revolving and which cut threads on the bolts, the bolts entering the hollow members 17 as shown in Fig. 4. hen the ends 48 of the bars 48 carried by the blocks 38 engage the spring members 27 they cam these springs inwardly so as to withdraw the locking lugs 27* thereby permitting the springs 26 to shift the yokes and the collars 19 so as to withdraw the cutters. There is, therefore, no danger of threading the bolts too far, since the cutters are released. The block 38 may be retracted by reversing the movement of the hand wheel 43. If now another pair of cutters is to be brought into use the hand lever 13 is shifted to the left in Fig. 5. This withdraws the stop lug 49 from the recess 50, disengages the clutch members 34 and 35 from their respective clutch members 18 and forces the clutch members 7 and 6 together. The face plate 16 is now revolved through the medium of the drive shaft 33, gear 32, gears 30 and 31, gear 5, clutch members 6 and 7 the latter being as stated upon the shaft 4. WVhen the proper pair of cutter holders is reached the hand lever 13 is thrown over to the right in Fig. 5 thereby putting the bolts in operative position, as has been heretofore described.

The device as described forms a means by which bolts may be accurately and quickly threaded and in which the cutter members may be readily shifted when desired.

We claim:

1'. In a bolt threading machine, a face plate, a plurality of pairs of revoluble cutter holders carried by said face plate, means for causing the revolution of a predetermined pair of cutter holders, said means comprising a drive shaft, a pair of auxiliary shafts each provided with a clutch member arranged to engage a driving head, and means for transmitting the movement from said drive shaft to said auxiliary shafts.

2. In a bolt threading machine, a face plate, a plurality of pairs of revoluble cutter holders carried by said face plate, means for causing the revolution of a predetermined pair of cutter holders, said means comprising a drive shaft, a pair of auxiliary shaftseach provided with a clutch member arranged toengage a driving head, and a clutch for transmitting the movement from said drive shaft to said auxiliary shafts.

3. In a bolt threading machine, a face plate, a plurality of pairs of revoluble cutter holders carried by said face plate, means for causing the revolution of a predetermined pair of cutter holders, said last named means comprising a drive shaft, a pair of auxiliary shafts each provided With a clutch member arranged to engage a driving head, a clutch for transmitting the movement from said drive shaft to said auxiliary shafts, and means for connecting and disconnecting the clutches carried by said auxiliary shafts with the cutter holders.

4. In a bolt threading machine, a drive shaft, a face plate, revoluble cutters carried by said face plate, said cutters being disposed in pairs, means disposed between the drive shaft and the face plate for revolving the latter at Will to bring each of said pairs of cutters into operative position successively.

5. In a bolt threading machine, a drive shaft, a face plate, revoluble cutters carried by said face plate, said cutters being disposed in pairs, means disposed between the drive shaft and the face plate for revolving the latter at will to bring each of said pairs of cutters into operative position successively, and means connected With said drive shaft for causing the revolution of the cutters When in their operative position.

CLARENCE VALE.

, THOMAS CLARENCE MUNDY. Vitnesses:

AMOS R. HEADLEY, H. I. HARING.

Copies 01! this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. Q. 

